ObjectiveTo compare the CT features of retroperitoneal ganglioneuroblastoma (GNB) and neuroblastoma (NB) in children,and summarize the differentiations between them.Methods From November 2007 to November 2011,19 patients with GNB and 21 patients with NB proven pathologically were enrolled in the study.The CT data of GNB and NB were analyzed retrospectively.These tumor parameters in CT included lesion location,size,shape,margin,calcification,across central line,style of contrast enhancement,degree of contrast enhancement,presence of small vessels in or around the tumor arranged in clumps or in line,tumor embolus,adjacent organs invasion or metastasis,lymph node metastasis,and relationship between tumor and surrounding great vessels.These parameters of both groups were compared by x2 and t test.ResultsIn GNB group,11 patients were located in adrenal gland and 8 patients in the retroperitoneal sympathetic chain; however,in NB group,18 patients were located in adrenal gland and 3 patients in the retroperitoneal sympathetic chain. The difference were statistical significances in the incidence rate of regular morphology,clear border,vessel encased by tumor,vessels displaced,presence of small vessels in /around the tumor arranged in clumps or in line,adjacent organs invasion or viscera metastasis,lymph node metastasis between NB (6/21,7/21,14/21,7/21,11/21,10/21,and 11/21,respectively) and GNB ( 12/19,13/19,6/19,13/19,4/19,3/19 and 4/19,respectively) ( P ＜ 0.05 ).However,there was no statistical significance in size,calcification,across central line,contrast enhancement type,contrast enhancement degree between them ( P ＞ 0.05 ).ConclusionsNB are more likely located at adrenal gland and presented a higher incidence rate of presence of small vessels in or around the tumor which arranged in clumps or in line,vessel encased by tumor,adjacent organs invasion or metastasis and lymph node metastasis.Regular morphology,clear border and vessels displaced are more frequently observed in GNB.

Objective To explore the clinicopathological characteristics in young women with breast cancer.Methods The clinicopathological data of 201 cases of breast cancer with age below 35 years from Apr.1997 to Apr.2010 in Anyang Tumor Hospital were retrospectively analyzed and compared with those of 251 cases of breast cancer patients selected randomly with age more than 60 years during the same period.All these cases had undergone surgical treatment and been confirmed by pathologist.Results In the young group,the percentage of patients with the course of disease less than six months was higher than that of the old-aged group [82.09 ％ (165/201),72.11％ (181/251)] (x2 =6.19,P ＜ 0.05).The incidence of the tumor size ≤ 2 cm in the young group was less than that of the old-aged group [19.90 ％ (40/201),30.28 ％ (76/ 251)] (x2 =6.302,P ＜ 0.05).The incidence rate of metastasis of lymph nodes in the young group was less than that of the old-aged group [63.68 ％ (128/201),54.19 ％ (136/251)] (x2 =4.145,P ＜ 0.05).The incidence rate of stage 0～ Ⅰ in the young group was more than that of the old-aged group [11.94 ％ (24/201),17.53 ％ (44/251)] (x2 =2.729,P ＞ 0.05).Conclusion The tumor size in the young group is larger than that in the old-aged group,pTNM classification in the young group is later than that in the latter group and the incidence rate of metastasis of lymph nodes in the young group is higher than that in the latter group.In young patients with breast cancer the percentage of tumors with advanced tumor stage and poor prognosis are more than that in elder breast cancer patients.In addition,these young patients have lower awareness to mammary adenocarcinoma.Young ladies should examine breast cancer by themselves and go to hospital for regular inspections in order to discovere,diagnose and treat cancer earlier.

Objective To investigate the value of Cytochrome P450 (CYP3A5) * 3 gene polymorphism in providing individualized administration for the use of tacrolimus (Tac) in renal transplantation recipients.Method Pyrophosphate sequencing method was used to determine the CYP3A5 * 3 genotype of renal transplant patients in the first day after surgery.Sixty recipients were divided into experiment group and control group.Both groups of patients were routinely given the initial dose of Tac-4.0 mg/day in the first day after surgery.The experiment group of patients were given different doses of Tac based on the different CYP3A5 * 3 genotypes at the third day after surgery [for AA:0.12 mg/(kg· day),and for GG:0.06 mg/(kg· day)],and the control group of patients were given different dosages of Tac according to drug concentration.Different parameters were compared between two groups of patients:percentage of patients reaching the target concentration (3-8 μg/L) at the fifth day after surgery,days required to reach the target concentration level,times needed to adjust the dosage of Tac within two weeks.Result The percentage of patients reaching the target concentration in experiment group and control group was 90％ and 46.67％,respectively (P＜ 0.05).Days required to reach the target concentration were (3.67 ± 1.32) and (7.57 ± 3.42) on average,respectively (P ＜ 0.05).Times of adjusting the Tac dose in experiment group was significantly less than those in the control group (P＜0.05).In the experiment group,the target concentration was obtained even without dosage adjustment (70％).Conclusion Individualized adjustment of Tac doses for patients according to recipients' different CYP3A5 * 3 genotypes is beneficial for reaching target concentration as soon as possible,which is superior to traditional dosage regimen.

Objective:To explore the learning experience of the medical massive open online course (MOOC) teaching design standard system constructed by the research group in the early stage.Methods:In this study, the questionnaire was adapted from four dimensions: academic analysis, curriculum content design, teaching process design, and teaching evaluation design, including 519 students majoring in clinical medicine of a university who had studied MOOC cases like "Ultra-early Diagnosis and Treatment of Acute Cerebral Infarction" based on the system. SPSS 25.0 was used for statistical analysis.Results:The system had a high degree of recognition in all dimensions, with 64.5% of academic analysis, 57.6% of content design, 54.5% of teaching design process, and 59.3% of teaching evaluation design.Conclusion:The study has found that the medical MOOC teaching design system has good learning experience effect. According to the data feedback, the key teaching design points such as the core factors of learning experience analysis and the suitability of teaching content in the practical operation of teaching design has been explored, providing the practical basis and method reference for the design of medical MOOC teaching design.

Objective To investigate the inhibitory effect of adriamycin in combination with hyperthermia on apoptosis and bcl-2 expression in the chronic leukemic cell line K562/AO2 in vitro.Methods The working con- centration of adriamycin against K562/AO2 determined by using methyl thiazolyl tetrazolium(MTT) assay was used to treat the chronic leukemic cell line K562/AO2 in vitro alone or in combination with hyperthermia induced using a hot water bath at 40,41 or 42℃.The inhibitory effect was evaluated by MTT assay.The apoptosis rates and bcl-2 ex- pression of K562/AO2 were determined by flow cytometry.Results The working concentration of adriamycin in the study was defined as its 50% inhibition concentration (IC50).A 60 min session of hyperthermia at 40℃,41℃or 42℃was associated with significant growth inhibition of the cell line K562/AO2.Adriamycin chemotherapy alone and with hyperthermia significantly inhibited the growth of K562/AO2.All treatments significantly increased apoptosis rates and down-regulated bcl-2 expression of the K562/AO2 cell line.Conclusion Adriamycin chemotherapy com- bined with 60 min sessions of hyperthermia showed significant suppression effect on K562/AO2 cell proliferation.The treatment can increase apoptosis rates and down-regulate bcl-2 expression.

Nowadays, nanotechnologies have shown wide application foreground in the biomedical field of medicine laboratory tests, drug delivery, gene therapy and bioremediation. However, in recent years, nanomaterials have been labeled poisonous, because of the disputes and misunderstandings of mainstream views on their safety. Besides, for the barriers of technical issues in preparation like: (1) low efficacy (poor PK & PD and low drug loading), (2) high cost (irreproducibility and difficulty in scale up), little of that research has been successfully translated into commercial products. Currently, along with the new theory of "physical damage is the origin of nanotoxicity", biodegradability and biocompatibility of nanomaterials are listed as the basic principle of safe application of nanomaterials. Combining scientific design based on molecular level with precision control of process engineering will provide a new strategy to overcome the core technical challenges. New turning point of translational medicine in nanotechnology may emerge.
Biocompatible Materials ; Nanostructures ; toxicity ; Nanotechnology ; Translational Medical Research

The traditional Chinese medicine (Tripterygium wilfordiiHook.f.,TWH) has been clinically used to treat primary and secondary renal diseases and proteinuria for nearly 40 years.However,there is a rare literature about the effect of triptolide (the main active ingredient of TWH) on the expression of oxidative carbonyl protein (OCP) in diabetic nephropathy (DN).This study aimed to provide experimental evidence for triptolide treatment on DN through its effect on the expression of OCP,in order to investigate the effects of triptolide on the expression of OCP in rats with DN.Sixty SD rats were randomly divided into five groups:control group,high-dose triptolide (Th) group,low-dose triptolide (T1) group,DN model group,and positive control (benazepril) group.The DN model was established using streptozotocin.Urinary protein excretion,fasting blood glucose (FBG),superoxide dismutase (SOD) in renal homogenate,malondialdehyde (MDA) in renal homogenate and renal nitrotyrosine by immunohistochemistry,and the expression of OCP by oxyblotimmune blotting were detected.In the DN model group,rat urinary protein excretion and renal MDA were significantly increased,while renal SOD significantly decreased and nitrotyrosine expression was obviously upregulated in the kidney.After triptolide treatment,24-h urinary protein excretion (61.96±19.00 vs.18.32±4.78 mg/day,P＜0.001),renal MDA (8.09±0.79 vs.5.45±0.68 nmol/L,P＜0.001),and nitrotyrosine expression were decreased.Furthermore,renal OCP significantly decreased,while renal SOD (82.50±19.10 vs.124.00±20.52 U/L,P＜0.001) was elevated.This study revealed that triptolide can down-regulate the expression of OCP in the renal cortex of DN rats.

Objective To investigate the feasibility to establish experimental model of autoimmune myocarditis and to study the value of echocardiographic assessment of left ventricular structure and function.Methods Seventy-two male 6 weeks old Lewis rats were randomly divided into 3 groups:normal control group,negative control group and positive group.Positive group were immunized with porcine cardiac myosin at days 0,7,30.Results ①The positive group showed weight loss,increased heart weight and myocardial necrosis with inflammatory infiltration.②The development of experimental autoimmune myocarditis included acute,subacute and chronic stages.The left ventricular diameter,ventricular wall thickness,left ventricular fractional shortening and ejection fraction of positive group differed significantly from those of other two groups.Conclusions Lewis rats immunized with porcine cardiac myosin may be a desirable experimental model of experimental autoimmune myocarditis,echocardiography can evaluate changes of cardiac structure and function accurately.

Objective To investigate the effect of parathyroid hormone (PTH) on the transition and connective tissue growth factor (CTGF) expression of human renal proximal tubular epithelial cell line HK-2 . Methods The expression of CTGF mRNA and protein of HK-2 cells were measured by real time RT-PCR and Western blot respectively . The effect of PTH on the phenotypic transformation of HK-2 cells was examined by light microscopy . The expression of α-smooth muscle actin (α-SMA) in HK-2 cells was detected by immunofluorescence . Results Basal level of CTGF mRNA and the protein expression were detected in HK-2 ceils . PTH upregulated the expression of CTGF mRNA and protein with the maximal response at the concentration of 10-10 mol/L and the best stimulating time was at 72 h . After exposure to PTH (10-10tool/L) for 12 hours, the highest level of luciferase activity was 1 .96 fold as compared to control (1 .888±0 .078 vs 0 .989±0 .030, P＜0 .01 ) . Untreated cells showed negligible expression of ±-SMA,whereas ±-SMA expression was significantly increased in cells treated with PTH . Conclusion PTH up-regulates CTGF expression and induces transition of HK-2 cells .

BACKGROUND:Locking compression plate and dynamic hip screw are the two major extramedul ary fixations for the femoral intertrochanteric fractures, however, the comparison of the clinical efficacy between two methods is stil controversial. OBJECTIVE:To systematical y evaluate the clinical efficacy of locking compression plate versus dynamic hip screw in the treatment of femoral intertrochanteric fractures, and provide a theoretical basis for clinical application. METHODS:Authors searched for control ed studies on locking compression plate and dynamic hip screw in the treatment of femoral intertrochanteric fractures in PubMed, Embase, Cochrane Library, China National Knowledge Infrastructure, VIP periodical database, Wanfang resource database, Chinese Biomedical Literature service systems published from January 1999 to April 2014. The inclusion and exclusion criteria were made, and the literature meeting the criteria was screened, and the methodological quality of the included studies was evaluated. Meta-analysis was carried out using the RevMan 5.2 software. RESULTS AND CONCLUSION:Ultimately 682 patients from 8 studies met the inclusion criteria, including 336 patients in the locking compression plate group and 346 patients in the dynamic hip screw group. Meta-analysis results showed that:there were no statistical y significant differences in operating time [MD=-12.07, 95%CI (-29.85, 5.71), P=0.18], peri-operative bleeding loss [MD=-15.01, 95%CI (-87.85, 57.83), P=0.69], post-operation drainage [MD=-13.62, 95%CI (-28.49, 1.26), P=0.07], ambulation time [MD=-0.14, 95%CI (-0.68, 0.41), P=0.63], length of hospitalization [MD=-0.74, 95%CI (-2.29, 0.82), P=0.35], bone union time [MD=-1.18, 95%CI (-2.78, 0.42), P=0.15] between locking compression plate and dynamic hip screw groups. The excellent and good rate of postoperative hip function reduction [OR=2.03, 95%CI (1.23, 3.36), P=0.006] was significantly higher in locking compression plate group than in the dynamic hip screw group. The incidence of coxa vara was lower in the locking compression plate group than in the dynamic hip screw group [OR=0.34, 95%CI (0.12, 0.96), P=0.04]. There were no significant differences in looseness, breakage, withdrawal of internal fixation [OR=1.20, 95%CI (0.59, 2.45), P=0.61] and the incidence of total complications [OR=0.55, 95%CI (0.24, 1.28), P=0.16] between locking compression plate and dynamic hip screw groups. However, the included studies have high possibility of selection bias and measurement bias, and wil affect proof strength of results. Therefore, more clinical randomized control ed studies with compact design are needed for verification.